CN102903810A - Light emitting diode and method for manufacturing the same - Google Patents
Light emitting diode and method for manufacturing the same Download PDFInfo
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- CN102903810A CN102903810A CN2011102496224A CN201110249622A CN102903810A CN 102903810 A CN102903810 A CN 102903810A CN 2011102496224 A CN2011102496224 A CN 2011102496224A CN 201110249622 A CN201110249622 A CN 201110249622A CN 102903810 A CN102903810 A CN 102903810A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 36
- 239000000758 substrate Substances 0.000 claims abstract description 81
- 239000004065 semiconductor Substances 0.000 claims description 30
- 229920002120 photoresistant polymer Polymers 0.000 claims description 18
- 238000000059 patterning Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- NYAVNTYRFWSLQL-UHFFFAOYSA-N lithium oxygen(2-) titanium(4+) Chemical compound [Li+].[O--].[O--].[Ti+4] NYAVNTYRFWSLQL-UHFFFAOYSA-N 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 4
- 229910052594 sapphire Inorganic materials 0.000 claims description 4
- 239000010980 sapphire Substances 0.000 claims description 4
- 229910017083 AlN Inorganic materials 0.000 claims description 3
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 3
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000000407 epitaxy Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
- H10H20/841—Reflective coatings, e.g. dielectric Bragg reflectors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/011—Manufacture or treatment of bodies, e.g. forming semiconductor layers
- H10H20/013—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials
- H10H20/0133—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials
- H10H20/01335—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials the light-emitting regions comprising nitride materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/814—Bodies having reflecting means, e.g. semiconductor Bragg reflectors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
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Abstract
本发明公开了一种发光二极管及其制造方法，所述发光二极管包括基板、介质反射镜层、第一导电层、发光层以及第二导电层。所述基板具有多个沟槽，而介质反射镜层设置于所述多个沟槽中，且介质反射镜层分别于每一个沟槽中形成一个介质反射镜区块。第一导电层设置于基板上，使得介质反射镜层位于基板与第一导电层之间，发光层设置于第一导电层上，且第二导电层设置于发光层上。当电流通过第一导电层、发光层与第二导电层时，发光层产生光线。由此，发光层所产生的光线可集中地朝向发光二极管的同一侧面射出。
The invention discloses a light-emitting diode and a manufacturing method thereof. The light-emitting diode includes a substrate, a dielectric mirror layer, a first conductive layer, a luminescent layer and a second conductive layer. The substrate has a plurality of grooves, and the dielectric mirror layer is disposed in the plurality of grooves, and the dielectric mirror layer forms a dielectric mirror block in each groove. The first conductive layer is disposed on the substrate, so that the dielectric mirror layer is located between the substrate and the first conductive layer, the luminescent layer is disposed on the first conductive layer, and the second conductive layer is disposed on the luminescent layer. When current passes through the first conductive layer, the luminescent layer and the second conductive layer, the luminescent layer generates light. Therefore, the light generated by the light-emitting layer can be emitted concentratedly toward the same side of the light-emitting diode.
Description
Technical field
The present invention relates to a kind of light-emitting diode and manufacture method thereof, and be particularly related to a kind of light-emitting diode and manufacture method thereof with dielectric mirror layer.
Background technology
The advantages such as light-emitting diode (light emitting diode, LED) has that low power consumption, volume are little, long service life and photoelectric characteristic are stable are quite extensive in the application of industry now.For instance, household electrical appliance, computer screen, mobile phone, lighting apparatus, medical equipment or traffic sign replace traditional bulb, fluorescent tube as main light source with light-emitting diode invariably.
Fig. 1 is the generalized section of light-emitting diode of the prior art.As shown in Figure 1, traditional light-emitting diode 9 sequentially is arranged on a N-shaped semiconductor layer 90, a luminescent layer 92 and a p-type semiconductor layer 94 on the substrate 96 usually, described N-shaped semiconductor layer 90 also can connect an electrode 902, and described p-type semiconductor layer 94 more can connect another electrode 942.When having specific voltage difference between two electrodes, 92 of luminescent layers can be driven by described voltage difference and produce light.In general, the one side that the user can select described light-emitting diode 9 usually is exiting surface, and aims at the object of wish irradiation with this exiting surface, and for example p-type semiconductor layer 94 can be the exiting surface of light-emitting diode, and the back side of substrate 96 expression light-emitting diodes.
Yet, luminescent layer 92 in fact not only can be luminous towards the exiting surface of light-emitting diode 9 (arrow from luminescent layer 92 toward p-type semiconductor layers 94 in such as Fig. 1), also simultaneously can be towards the back side illuminated of light-emitting diode 9 (arrow from luminescent layer 92 toward substrates 96 in such as Fig. 1), so that the light that luminescent layer 92 produces can't focus utilization and form consume.In addition, if light during accumulation of heat, will be reduced emitting brightness and the efficient of light-emitting diode by inner each layers absorption of light-emitting diode 9 possibly.Therefore, the light that luminescent layer 92 is produced can penetrate towards exiting surface in the concentrated area, and to improve the luminosity of light-emitting diode 9, real is present most important problem.
Summary of the invention
The object of the present invention is to provide a kind of light-emitting diode, has the dielectric mirror layer with the light at the reflection directive light-emitting diode back side, the light that the luminescent layer of light-emitting diode is produced can penetrate towards exiting surface in the concentrated area, to improve the luminosity of light-emitting diode.
The embodiment of the invention provides a kind of light-emitting diode, comprises substrate, dielectric mirror layer, the first conductive layer, luminescent layer and the second conductive layer.Described substrate has a plurality of grooves, and the dielectric mirror layer is arranged in described a plurality of groove, and the dielectric mirror layer is respectively at forming a dielectric mirror block in each groove.The first conductive layer is arranged on the substrate, so that the dielectric mirror layer is between substrate and the first conductive layer, luminescent layer is arranged on the first conductive layer, and the second conductive layer is arranged on the luminescent layer.When electric current passed through the first conductive layer, luminescent layer and the second conductive layer, luminescent layer produced a light.
In the present invention's one example embodiment, dielectric mirror block and the first conductive layer in each groove can surround out an air gap.In addition, described air gap has depth-to-width ratio example, three races's semi-conducting material of the first conductive layer and the ratio modulation of five family's semi-conducting materials in described depth-to-width ratio example system's foundation brilliant technique of heap of stone.In addition, described a plurality of grooves can be formed at a upper surface of substrate, and are arranged at dielectric mirror layer and upper surface copline in described a plurality of groove.
Another object of the present invention is to provide a kind of method for manufacturing light-emitting, the light-emitting diode of the method manufacturing, has the dielectric mirror layer with the light at the reflection directive light-emitting diode back side, the light that the luminescent layer of light-emitting diode is produced can penetrate towards exiting surface in the concentrated area, to improve the luminosity of light-emitting diode.
The embodiment of the invention provides a kind of method for manufacturing light-emitting, in described method for manufacturing light-emitting, the patterning photoresist layer is set on substrate at first.Then, carry out an etch process, a plurality of zones that cover in order to not to be patterned photoresist layer on the etching substrates, so that substrate forms a plurality of grooves, corresponding described a plurality of zones, the formed position of described a plurality of grooves.Then, form the dielectric mirror layer on the patterning photoresist layer and in described a plurality of groove, and the dielectric mirror layer is respectively at forming a dielectric mirror block in each groove.Then, remove the patterning photoresist layer.Then, on substrate, form the first conductive layer, so that the dielectric mirror layer is between substrate and the first conductive layer.Then, on the first conductive layer, form a luminescent layer, and on luminescent layer, form one second conductive layer.When electric current passed through the first conductive layer, luminescent layer and the second conductive layer, luminescent layer produced light.
In sum, the light-emitting diode that the embodiment of the invention provides and manufacture method thereof are owing to being formed on the dielectric mirror layer in the groove of substrate, so that the dielectric mirror block in each groove and substrate can be copline haply.Thus, when other retes (for example conductive layer) when being formed on the substrate, can not protrude or be depressed in substrate and produce the problem that involution is difficult for because of the dielectric mirror block.Simultaneously, the present invention also can pass through the dielectric mirror layer, and with the light at the reflection directive light-emitting diode back side, the light that the luminescent layer of light-emitting diode is produced can penetrate towards exiting surface in the concentrated area, to improve the luminosity of light-emitting diode.
For enabling further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet appended graphic only provide with reference to and explanation usefulness, be not to the present invention's limitr in addition.
Description of drawings
Fig. 1 is the generalized section of light-emitting diode of the prior art.
Fig. 2 A is the profile of the light-emitting diode of one embodiment of the invention.
Fig. 2 B is the stereogram of the section of the groove of demonstration one embodiment of the invention.
Fig. 2 C is the stereogram of the section of the groove of another embodiment of demonstration invention.
Fig. 2 D is the schematic diagram of the air gap of one embodiment of the invention.
Fig. 2 E is the partial enlarged drawing of a-quadrant among Fig. 2 D.
Fig. 3 is the flow chart of the method for manufacturing light-emitting of one embodiment of the invention.
Fig. 4 A is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.
Fig. 4 B is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.
Fig. 4 C is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.
Fig. 4 D is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.
Fig. 4 E is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.
Wherein, description of reference numerals is as follows:
1: light-emitting diode 10: substrate
12: 14: the first conductive layer of dielectric mirror layer
16: 18: the second conductive layers of luminescent layer
20: patterning photoresist layer 102: groove
122: dielectric mirror block 142: electrode
182: electrode 9: light-emitting diode
90:n type semiconductor layer 92: luminescent layer
94:p type semiconductor layer 96: substrate
902: electrode 942: electrode
R1, R2: length S30～S42: steps flow chart
Embodiment
(light-emitting diode embodiment)
See also Fig. 2 A, Fig. 2 A is the profile of the light-emitting diode of one embodiment of the invention.Shown in Fig. 2 A, light-emitting diode 1 of the present invention has substrate 10, dielectric mirror layer (not shown in Fig. 2 A), the first conductive layer 14, luminescent layer 16 and the second conductive layer 18.Described dielectric mirror layer, the first conductive layer 14, luminescent layer 16 and the second conductive layer 18 sequentially are arranged on respectively on the substrate 10, so that the first conductive layer 14 is between substrate 10 and luminescent layer 16, and luminescent layer 16 is between the first conductive layer 14 and the second conductive layer 18.The present embodiment is in Fig. 2 A, and the upper surface of the second conductive layer 18 can be the exiting surface of light-emitting diode 1, and the lower surface of substrate 10 can be the back side of light-emitting diode 1.Note that in graphic for can clearer each layer of expression or the feature of each structure, may proportionally not draw the relative size of each layer or each structure, below each element of light-emitting diode 1 of the present invention is described respectively.
If take columniform groove 102 as example, please in the lump referring to Fig. 2 B and Fig. 2 C, Fig. 2 B is the stereogram of the section of the groove of demonstration one embodiment of the invention, and Fig. 2 C is the stereogram of the section of the groove of another example embodiment of demonstration the present invention.As shown in the figure, on the surface that the groove 102 among the present invention can be regularly, array be arranged on substrate 10 with arranging (such as Fig. 2 B), perhaps groove 102 also can be arranged on the surface of substrate 10 (such as Fig. 2 C) randomly.For instance, in order to increase the efficient of light reflection, the arrangement of groove 102 can be leg-of-mutton array, hexagonal array or tetragonal array, the present invention is not limited at this, and the queueing discipline of groove 102 can be had by affiliated technical field knows that usually the knowledgeable looks actual needs and designs.
Please continue the A referring to Fig. 2, the dielectric mirror layer is arranged in described a plurality of groove 102, and the dielectric mirror layer is respectively at forming a dielectric mirror block 122 in each groove 102.In in fact, the material of dielectric mirror layer and dielectric mirror block 122 can be silicon dioxide, titanium dioxide, tantalum pentoxide, silicon nitride or other suitable materials.At this, groove 102 is formed at a upper surface of substrate 10, the degree of depth with groove 102 is close haply and be arranged at the thickness of the dielectric mirror block 122 in the groove 102 so that insert dielectric mirror block 122 groove 102 can with the upper surface of described substrate 10 copline haply.In other words, dielectric mirror block of the present invention 122 embeds among the substrates 10, and so that substrate 10 can have than even curface.When further making other retes on substrate 10, the substrate 10 that has than even curface can have the brilliant efficient of better length.
Certainly, the present invention does not limit described dielectric mirror block 122 must form smooth plane with groove 102, and dielectric mirror block 122 also can be slightly protruding in the upper surface of substrate 10 or slightly recessed in the upper surface of substrate 10.As long as dielectric mirror block 122 might as well for fear of make other retes on the substrate 10, have in affiliated technical field and know that usually the knowledgeable can freely design the degree of depth of thickness and the groove 102 of dielectric mirror block 122.
It should be noted that, although at substrate 10 more large-area groove 102 and dielectric mirror block 122 are set, the light that the luminescent layer 16 of light-emitting diode 1 produces can reflect more light (shown in the arrow of directive dielectric mirror block 122), so that can penetrate (shown in the arrow of directive the second conductive layer 18) towards exiting surface in the concentrated area.Yet the area of groove 102 and dielectric mirror block 122 is crossed conference makes other retes be difficult for being fixedly arranged on the substrate 10, and can have problems on the durability of light-emitting diode 1.Therefore, can be easily positioned on the substrate 10 in order to make other retes, groove 102 and dielectric mirror block 122 should be arranged on the surface of substrate 10 with suitable area ratio.Have in affiliated technical field and usually to know the knowledgeable under the prerequisite of the durability of not damaging light-emitting diode 1, visual actual needs and adjust groove 102 and dielectric mirror block 122 at the lip-deep area ratio of substrate 10.
Please continue the A referring to Fig. 2, the first conductive layer 14 is arranged on the substrate 10, so that dielectric mirror layer and dielectric mirror block 122 be between substrate 10 and the first conductive layer 14, and luminescent layer 16 is arranged on the first conductive layer 14, and the second conductive layer 18 is arranged on the luminescent layer 16.At this, the first conductive layer 14 can be a kind of N-shaped semiconductor layer, and the second conductive layer 18 can be a kind of p-type semiconductor layer, and the first conductive layer 14 and the second conductive layer 18 more can be distinguished connecting electrode 142 and electrode 182.When electrode 142 and 182 at electrode have a voltage difference, and so that the first conductive layer 14, luminescent layer 16 and the second conductive layer 18 have an electric current by the time, luminescent layer 16 can be driven and be produced light.
In in fact, the dielectric mirror block 122 in each groove 102 and the first conductive layer 14 can surround out an air gap.Please in the lump referring to Fig. 2 D and Fig. 2 E, Fig. 2 D is the schematic diagram of the air gap of one embodiment of the invention, and Fig. 2 E is the partial enlarged drawing in E zone among Fig. 2 D.As shown in the figure, air gap 144 is between dielectric mirror block 122 and the first conductive layer 14, wherein but the width R1 of air gap 144 and degree of depth R2 have the depth-to-width ratio example of a modulation, and described depth-to-width ratio example is the corresponding change according to the ratio of five family's semi-conducting materials with three races's semi-conducting material of the first conductive layer 14 in the epitaxy technique (being called again five or three ratios).At this, described 53 than being in the unit volume, the number ratio of five family's ions and three races's ion, or the molar ratio of five family's ions and three races's ion.
For instance, if five or three than in 0 to 2000 scope, then the width R1 of air gap 144 and degree of depth R2 are minimum, almost do not surround out air gap 144 and can be considered between dielectric mirror block 122 and the first conductive layer 14.If five or three than greater than 2000, just then can surround out air gap 144 between dielectric mirror block 122 and the first conductive layer 14, preferably, if five or three compare in 2000 to 3000 scope, then can produce the air gap 144 of suitable size.In in fact, the dielectric mirror block 122 suitably air gap 144 of size of can arranging in pairs or groups helps to improve the light reflection efficient of substrate 10.Certainly, there is not air gap 144 and when dielectric mirror block 122 is only arranged, light-emitting diode 1 of the present invention equally also can be reached the purpose of reflection ray, therefore the present invention does not limit between dielectric mirror block 122 and the first conductive layer 14 air gap 144 must not arranged.
(method for manufacturing light-emitting embodiment)
Below collocation method for manufacturing light-emitting of the present invention is described further.Please in the lump referring to Fig. 3, Fig. 4 A, Fig. 4 B, Fig. 4 C, Fig. 4 D and Fig. 4 E, Fig. 3 is the flow chart of the method for manufacturing light-emitting of one embodiment of the invention, and Fig. 4 A to Fig. 4 E is that the light-emitting diode of one embodiment of the invention is in the profile of manufacture process.In step S30 and Fig. 4 A, at first at substrate 10 patterning photoresist layer 20 is set, described patterning photoresist layer 20 can be have regularly, photoresistance pattern that array is arranged ground, perhaps patterning photoresist layer 20 can be the photoresistance pattern of random setting.But do not have the surface of groove 102 on the above-mentioned zone counterpart substrate 10 that is covered by the photoresistance pattern, and the zone of the substrate 10 that is not covered by described photoresistance pattern is the selected surface that produces groove 102.
Then, in step S32 and Fig. 4 B, carry out an etch process, a plurality of zones that cover in order to not to be patterned photoresist layer 20 on the etching substrates 10, so that substrate 10 forms a plurality of grooves 102, described a plurality of groove 102 formed position correspondences are not patterned the zone that photoresist layer 20 covers.In in fact, groove 102 is subjected to photoetch and is depressed in substrate 10, but the present invention is as limit, and groove 102 more can be subjected to other physical properties or chemistry etching and be depressed in substrate 10, and described groove 102 also can be that to be etched in advance substrate 10 lip-deep.
Then, in step S34 and Fig. 4 C, form dielectric mirror layer 12 on patterning photoresist layer 20 and in described a plurality of groove 102, and dielectric mirror layer 12 is respectively at forming dielectric mirror block 122 in each groove 102.Then, in step S36 and Fig. 4 D, remove patterning photoresist layer 20 and cover dielectric mirror layer 12 on the patterning photoresist layer 20, and only stay the structure in the substrate 10.At this, the thicknesses of layers of dielectric mirror layer 12 approximately is the etch depth of groove 102, so that after dielectric mirror layer 12 inserts groove 102 and removes patterning photoresist layer 20, the upper surface of substrate 10 can have the dielectric mirror block 122 of a plurality of embeddings, and the upper surface of substrate 10 is an even curface haply.
Then, in step S38 and Fig. 4 E, on substrate 10, form the first conductive layer 14, so that dielectric mirror layer 12 and dielectric mirror block 122 are between substrate 10 and the first conductive layer 14.Then, in step S40 and step S42, illustrated respectively on the first conductive layer 14, to form luminescent layer 16, and on luminescent layer 16, formed the second conductive layer 18.
In sum, the light-emitting diode that the embodiment of the invention provides and manufacture method thereof can be formed on the dielectric mirror layer in the groove of substrate, so that the dielectric mirror block in each groove and substrate can be copline haply, to keep the planarization of upper surface of base plate.Thus, when other retes (for example conductive layer) when being formed on the substrate, can not protrude or be depressed in substrate and produce the problem that involution is difficult for because of the dielectric mirror block.Simultaneously, the present invention also can and be scattered in dielectric mirror block on the substrate by the dielectric mirror layer, light with the reflection directive light-emitting diode back side, the light that the luminescent layer of light-emitting diode is produced can penetrate towards exiting surface in the concentrated area, to improve the luminosity of light-emitting diode.
The above only is better possible embodiments of the present invention, and is non-so limit to claim of the present invention, therefore the equivalence techniques that such as uses specification of the present invention and graphic content to do changes, all is contained in the claim scope of the present invention.
Claims (16)
1. a light-emitting diode is characterized in that, comprising:
One substrate has a plurality of grooves;
One dielectric mirror layer is arranged in described a plurality of groove, and this dielectric mirror layer is respectively at forming a dielectric mirror block in each this groove;
One first conductive layer is arranged on this substrate, so that this dielectric mirror layer is between this substrate and this first conductive layer;
One luminescent layer is arranged on this first conductive layer; And
One second conductive layer is arranged on this luminescent layer;
Wherein when an electric current passed through this first conductive layer, this luminescent layer and this second conductive layer, this luminescent layer produced a light.
2. light-emitting diode as claimed in claim 1 is characterized in that, this dielectric mirror block and this first conductive layer in each this groove surround out an air gap.
3. light-emitting diode as claimed in claim 2 is characterized in that, this air gap has depth-to-width ratio example, and this depth-to-width ratio example is according to five family's semi-conducting materials of this first conductive layer in the epitaxy technique and the ratio modulation of three races's semi-conducting material.
4. light-emitting diode as claimed in claim 2 is characterized in that, five family's semi-conducting materials of this first conductive layer and the ratio of three races's semi-conducting material surpass 2000.
5. light-emitting diode as claimed in claim 4 is characterized in that, five family's semi-conducting materials of this first conductive layer and the ratio of three races's semi-conducting material are in 2000 to 3000 scope.
6. light-emitting diode as claimed in claim 1, it is characterized in that, when the ratio of five family's semi-conducting materials of this first conductive layer and three races's semi-conducting material is in 0 to 2000 scope, do not have an air gap between this dielectric mirror block in each this groove and this first conductive layer.
7. light-emitting diode as claimed in claim 1 is characterized in that, described a plurality of channel shaped are formed in a upper surface of this substrate, and is arranged at this dielectric mirror layer and this upper surface copline in described a plurality of groove.
8. light-emitting diode as claimed in claim 1, it is characterized in that, the material of this substrate is selected from the material in the group that silicon, gallium nitride, aluminium nitride, sapphire, spinelle, carborundum, GaAs, alundum (Al2O3), titanium dioxide lithium gallium, titanium dioxide lithium aluminium and four magnesium oxide, two aluminium consist of.
9. a method for manufacturing light-emitting is characterized in that, comprises the following steps:
One patterning photoresist layer is set on a substrate;
Carry out an etch process, a plurality of zones that do not covered by this patterning photoresist layer on this substrate of etching, so that this substrate forms a plurality of grooves, corresponding described a plurality of zones, the formed position of described a plurality of grooves;
Form a dielectric mirror layer on this patterning photoresist layer and in described a plurality of groove, and this dielectric mirror layer is respectively at forming a dielectric mirror block in each this groove;
Remove this patterning photoresist layer;
On this substrate, form one first conductive layer, so that this dielectric mirror layer is between this substrate and this first conductive layer;
On this first conductive layer, form a luminescent layer; And
On this luminescent layer, form one second conductive layer;
Wherein when an electric current passed through this first conductive layer, this luminescent layer and this second conductive layer, this luminescent layer produced a light.
10. method for manufacturing light-emitting as claimed in claim 9 is characterized in that, this dielectric mirror block and this first conductive layer in each this groove surround out an air gap.
11. method for manufacturing light-emitting as claimed in claim 10 is characterized in that, this air gap has depth-to-width ratio example, and this depth-to-width ratio example is according to three races's semi-conducting material of this first conductive layer and the ratio modulation of five family's semi-conducting materials in the brilliant technique of heap of stone.
12. method for manufacturing light-emitting as claimed in claim 10 is characterized in that, five family's semi-conducting materials of this first conductive layer and the ratio of three races's semi-conducting material surpass 2000.
13. method for manufacturing light-emitting as claimed in claim 12 is characterized in that, five family's semi-conducting materials of this first conductive layer and the ratio of three races's semi-conducting material are in 2000 to 3000 scope.
14. method for manufacturing light-emitting as claimed in claim 9, it is characterized in that, when the ratio of five family's semi-conducting materials of this first conductive layer and three races's semi-conducting material is in 0 to 2000 scope, do not have an air gap between this dielectric mirror block in each this groove and this first conductive layer.
15. method for manufacturing light-emitting as claimed in claim 9 is characterized in that, described a plurality of channel shaped are formed in a upper surface of this substrate, and are arranged at this dielectric mirror layer and this upper surface copline in described a plurality of groove.
16. method for manufacturing light-emitting as claimed in claim 9, it is characterized in that, the material of this substrate is selected from the material in the group that silicon, gallium nitride, aluminium nitride, sapphire, spinelle, carborundum, GaAs, alundum (Al2O3), titanium dioxide lithium gallium, titanium dioxide lithium aluminium and four magnesium oxide, two aluminium consist of.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100126624 | 2011-07-27 | ||
| TW100126624A TWI438933B (en) | 2011-07-27 | 2011-07-27 | Light-emitting diode structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102903810A true CN102903810A (en) | 2013-01-30 |
Family
ID=46679138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102496224A Pending CN102903810A (en) | 2011-07-27 | 2011-08-23 | Light emitting diode and method for manufacturing the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130026491A1 (en) |
| EP (1) | EP2551922A3 (en) |
| CN (1) | CN102903810A (en) |
| TW (1) | TWI438933B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218129A (en) * | 2014-09-24 | 2014-12-17 | 杭州士兰明芯科技有限公司 | Led substrate structure and manufacturing method thereof |
| CN104241478A (en) * | 2014-09-24 | 2014-12-24 | 杭州士兰明芯科技有限公司 | LED (light emitting diode) substrate structure and manufacturing method thereof |
| CN113764555A (en) * | 2021-07-28 | 2021-12-07 | 西安电子科技大学芜湖研究院 | AlN UV light-emitting diode based on nano-patterned intercalation layer and preparation method thereof |
| CN115207072A (en) * | 2022-07-25 | 2022-10-18 | 京东方科技集团股份有限公司 | Display panel, method for making the same, and display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6457243B2 (en) * | 2014-11-06 | 2019-01-23 | 株式会社東芝 | Current sensor and smart meter |
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- 2011-07-27 TW TW100126624A patent/TWI438933B/en active
- 2011-08-23 CN CN2011102496224A patent/CN102903810A/en active Pending
- 2011-09-23 US US13/241,563 patent/US20130026491A1/en not_active Abandoned
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- 2012-07-27 EP EP12178183.5A patent/EP2551922A3/en not_active Withdrawn
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| TW472400B (en) * | 2000-06-23 | 2002-01-11 | United Epitaxy Co Ltd | Method for roughing semiconductor device surface to increase the external quantum efficiency |
| CN1649090A (en) * | 2004-01-29 | 2005-08-03 | Lg电子有限公司 | Nitride semiconductor thin film and method for growing the same |
| US20100015739A1 (en) * | 2005-06-25 | 2010-01-21 | Epiplus Co., Ltd. | Semiconductor light emitting device having improved luminance and manufacturing method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201306310A (en) | 2013-02-01 |
| EP2551922A2 (en) | 2013-01-30 |
| EP2551922A3 (en) | 2013-11-06 |
| TWI438933B (en) | 2014-05-21 |
| US20130026491A1 (en) | 2013-01-31 |
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